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In this paper, the authors present a novel architecture to support large scale stream processing services in a widely distributed environment. The proposed system, COSMOS, distinguishes itself by its loose coupling and communication efficiency. To exploit the sharing of data transfer incurred by different queries and to break the tight coupling of the distributed nodes, a new communication paradigm, content-based network, is employed. They discuss the design and the challenges of this system. There is an emerging interest from the database community to build large scale stream processing services in a widely distributed environment.
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